The Coastal Green Hairstreak butterfly (Callophrys viridis) was thought to be extinct in San Francisco due ...

Join us in San Francisco for a grassroots, smartphone-powered bioblitz to catalogue every living species we...

Green Hairstreak butterflies are our jewels of the Inner Sunset. The Green Hairstreak Corridor is a true ur...

Welcome to Nature in the City's Green Hairstreak Monitoring Project! Your observations help provide more co...